Both Auto PAP (Automatic Positive Airway Pressure) and CPAP (Continuous Positive Airway Pressure) devices send air directly to the lungs, holding the airway open and preventing it from collapsing.
Only one machine can adjust itself to find a pressure level that maximizes your comfort: the Auto PAP. The Auto PAP device “breathes” with you delivering the right amount of air pressure at the right time to keep your airways open, while the older CPAP device blows air at a constant pressure regardless of your breathing pattern.
The diagram to the right shows how the Auto PAP automatically adjusts the pressure delivered as you breathe. The Auto PAP machine continuously searches for the right pressure level to deliver the correct amount that is neither too high nor too low, maximizing both comfort and use. The pressure matches your natural breathing cycle, providing inspiratory comfort (breathing in) and expiratory relief (breathing out). The result is a pressure pattern that matches your entire breathing cycle.
In contrast, the CPAP delivers a continuous airstream that is incapable of adjusting to your needs. The constant positive pressure is maintained throughout the entire breath cycle.
Additionally, the Auto PAP is superior to the CPAP machine in that it does not need to be titrated (adjusted) in a sleep lab. When using a CPAP, you must stay overnight at a sleep lab to have your device titrated.